Flash GDP Estimates Using Freight Transport Data

How can a country estimate its economic performance weeks ahead of official statistics? We helped develop a pioneering analytical model that uses real-time toll system data to produce flash estimates of Slovakia's quarterly GDP — delivering economic insights when they matter most.

Challenge

Traditional GDP calculations require months of data collection and processing, leaving policymakers and businesses operating with outdated economic intelligence. Slovakia needed a way to understand its current economic situation faster — not in retrospect, but in near real-time.

Beyond speed, the challenge was proving that unconventional data sources could deliver reliable macroeconomic insights. It required bridging the gap between transportation telemetry and economic modeling — two worlds that rarely intersect in official statistics.

Approach

We partnered with the Statistical Office of the Slovak Republic to analyze data from Slovakia's electronic toll system — covering 17,600 km of roads and capturing movement of all freight vehicles over 3.5 tons. Using advanced time-series models (SARIMAX), we transformed truck mileage patterns into a powerful economic indicator, validated against actual GDP figures.

The model demonstrates that freight transport intensity serves as a strong proxy for economic activity. By combining satellite-collected toll data with sophisticated analytics, we created a replicable methodology that turns infrastructure data into actionable economic intelligence — available by the 10th day of each month.

Outcome

The SARIMAX model achieved remarkable accuracy with a mean absolute percentage error of just 0.67% and delivered GDP estimates within 95% confidence intervals. This represents a shift from quarterly reporting delays to near-monthly economic visibility — a significant advancement for evidence-based decision-making and experimental statistics.

The project opens new possibilities for leveraging IoT and telemetry data in official statistics. It demonstrates that smart infrastructure investments can yield dual benefits: operational efficiency and real-time economic monitoring that supports faster, better-informed policy responses.

Explore the full case

If you like to explore the full scope of this case study, read the publication with our contributions to experimental statistics using big data available for download (link: https://slovak.statistics.sk/wps/portal/ext/products/ssad/one/ssad-archiv/52148294-22a2-4356-8391-9a5e87ab8330/!ut/p/z1/rVNNU4MwEP01PabZkADhGB0FlFb5bJuLk9YqWIFamKL_3qDV8SKtM-aQ2Uzee5t9u8ESz7Gs1L54VG1RV-pZnxfSusuCW352RgRAPHHAz2KW3HDb8KYMzz4Aoe1_Avg0ugA_EbdudMUIMBNLfS3CMIyDLAM3My7Bp8SFaZoCRPaBf-4Kj9kBAA9cE3zhpZETUgqCfvC_899YiQmCZwLi4JrwkBz48MsScBp_4IEDfNenB_4AQA77l2GJ5apqt22OF_WyUTlqNiPg468YNY26H0G_I7Vb5cV-BKZBGDcchgxDGYhR00KcOgQ5ylxzWy25tq7X3a6Ke7w4CT071mg5bPOsz3ekk8c05OCwJNYBMGB23GzwQldi_1rJpYVn-2Ld4bSqd6We8PiPRnmAr7AsluW4W5VjGANl1AKLcM51SJht9Z_G2E3OJ49aWLU5KqqHGs9_dBDPT0qldYqnlxcp9ITUVbt-bfH8X0dkW6b9Kjl9Q5vI67rkIX9-euveAQepZmg!/dz/d5/L2dBISEvZ0FBIS9nQSEh/)

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